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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 200MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.35V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：90 µA
- Current - Supply (Max)：100 µA
- PSRR：88dB ~ 48dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDK320M18R is a fixed-output linear voltage regulator from the LDK320 family, manufactured by STMicroelectronics. It provides a fixed output voltage of 1.8V with a maximum output current of 200mA. The device operates with an input voltage range from 2.5V to 18V and features a typical dropout voltage of 100mV at 100mA load. It includes logic-controlled electronic shutdown, reducing quiescent current to less than 1μA in off mode. The regulator offers high power supply rejection ratio (PSRR) of 88dB at 120Hz and low output noise. Protection features include short-circuit current limiting, thermal shutdown, and safe operating area protection. It is housed in a SOT-23-5 package.
Feature Summary
- Logic-controlled electronic shutdown for ultra-low power consumption
- High power supply rejection ratio for clean power delivery
- Integrated short-circuit, thermal, and SOA protections
- Compatible with ceramic output capacitors
Applications
- Digital Signal Controllers
- Television systems
- Blu-ray and DVD players
- Personal computers
- Industrial equipment
Procurement Notes
Verify the specific suffix 'M18R' corresponds to the 1.8V fixed output variant and SOT-23-5 package configuration. Confirm RoHS compliance status and environmental certifications such as REACH if required for your region. Ensure the ordering code matches the exact tape-and-reel or cut-tape packaging preference specified by the distributor. Cross-reference the manufacturer part number with official STMicroelectronics documentation to avoid counterfeit components.
Selection Notes
Select this component when a stable 1.8V rail is needed from inputs up to 18V. It is suitable for battery-powered applications due to low quiescent current and shutdown capability. Consider the SOT-23-5 package size constraints and thermal performance. Verify that the required output current does not exceed 200mA and that the input voltage remains within the 2.5V to 18V operational range for optimal regulation.
Part Context
The LDK320 series comprises high-accuracy, high-PSRR low-dropout regulators available in various fixed output voltages and adjustable versions. The M18R designation specifically indicates the 1.8V fixed output option. This family is designed for applications requiring low noise and efficient power management in compact form factors, serving both consumer electronics and industrial markets with robust protection features.
Replacement Considerations
Check for other LDK320 variants with different output voltages if 1.8V is not required. Verify pin compatibility with SOT-23-5 packages from other manufacturers if cross-sourcing. Ensure replacement parts support the same input voltage range and current capabilities.
